Jet apparatus



(MOdeL) W. R. PARK.

JET APPARATUS.

atented Nov. 23, 1886.

WM EESEE \NITED STATES PATENT OFFICE.

WILLIAM R1,. PARK, OF TAUN'ION, MASSACHUSETTS.

JET APPARATUS.

SPECIFICATION forming part of Letters Patent No. 352,980, dated November 23, 1886.

I Application filed February 11, 1856. Serial No. 191,568. Modeh) companying drawings, in which- Figure l is a lengthwise section of 'an apparatus embodying all the features of my invention, and Fig. "2 is a diagram.

My invention is designed mainly for feeding boilers, but is applicable of course to other uses. That form of it shown in the drawings is, however, especially designed for-use as a boiler-feed.

A represents the water-supply inlet, which communicates by properpipes with the waterreservoir;and a is the water-chamber. The steam-inlet B has two branches, 1) b, so that steam entering at B flows by branch I) through nozzle D and by branch b through nozzle F, which in that form of my apparatus shown in the drawings is the'annular space between the end of tube (1 and the entrance of tube f. When used as a boiler-feed, the steam-inlet B is connected by pipes with the steam-space of and this valve opens when there is pressure in chamber H,-lout is held closed when there is a partial vacuum in chamber H.

None of the parts are new in themselves, nor is the combination of the two nozzles, each with its combining and delivery tubes,'ne w, for, as is well known to all skilled in this art, that combination is shown in Giffards English Patent No. 1,665 of 1858; and my invention is an improvement upon the apparatus shown in Fig. 2 of that patent; and it consists, mainly, in modifying the overflows, whereby'the operation of the apparatus is made more certain and effective.

In Giffards apparatus the lifter-oveiflow wasformed by separating the combining and delivery tubes of the lifter-jet, and this overflow I retain-at d but connect it with the water-chamber a, and thereby materially modify its operation, for in my apparatus the opening d is rather a regulator than'an overflow, spilling or discharging the surplus Water when too much enters the combining-tube d and admitting more water when too little is taken 5 5 into tube d, for, as will be clear to all skilled in the art, the nozzle D and tubes d and dwill not act with their maximum effect, except under a certain pressure of steam, when the tubes cl d are made without opening 61", as 60. shown in Fig. 2, for in that case, if the stearnpressure he too low more water will enter con'ibining-tube d than can be properly delivcred through tube d, while if the steam-pressure be too high the quantity of water passing 65 through tubes d 01 will be less than it should be.

\VhileI am aware that I am not the first to connect the throat or junction of. the combining and delivery tubes of the lifter-jet with 7c the water-chamber, I am, so far as I know, the first to combine the nozzle D, nozzle F,tubes ff f and overflow G with the tubes d 07,,

having the overflow d at their junction leading to the water-supply, and this combination is the main feature of my invention- In Giflar'ds apparatus the combining-tube of forcer-jet, corresponding to the tubes f f of my apparatus, was not connected with an overflow; and another feature of my invention conto sists in the combination of the nozzle D, tubes d d, and nozzle F with the tubesfff when the tubes f f are connected with overflow G. This combination is new with me, so far as I know, although I am aware that I am not the first to make openings in the combining-tube of the forcer-jet and to connect these openings with the overflow; but in all jet apparatus known to me the combining-tube of the foreing-jet either lacked the connection with the 9C overflow, as in Giffardsapparatus, or else was not used in combination with the, lifter-j et and its combining and delivery tubes.

The practical value of my improvements on the Gifi'ard apparatus will be clear fronian 5 understanding of the operation of my appa-K ratus. .Vhen steam is let on, it flows through the nozzle D, tubes d d, nozzle F, and tube f and escapes freely through openings f and overflow G, thereby tending to form a vacuum 0 in the water-chamber a and in the water-supply pipe leading from it. The result is a current of supply-water mixed with condensed.

steam through tubes d dfff and chamber J becomes full of water under pressure due to the effort of the current from tubef to enter it, and the pressure in that chamber raises check-valve K and water enters the boiler. As soon as this takes place any steam or water remaining in chamber H is carried along by the current in tubes ff f and chamber H becomes a vacuum-chamber, the valve 9 being then held upon its seat by the pressure of the atmosphere. This apparatus, consisting of the two steanrnozzles D and F, the tubes d d f f f, the water-chamber a, the chamber H, and its overflow G, with the openings f leading to the overflow, constitutes an efficient apparatus for lifting water to a great height, as well as for feedinga boiler, and works admirably at that steam-pressure to which the nozzles and their combining and delivery tubes are adapted, 'requiringno other manipulation than to let on or shut off steam. This apparatus is illustrated by the diagram, Fig. 2, and does not differ in substance from the practical apparatus, as shown in Fig. 1, except only in the absence of the openings d at or near the junction of the combining and delivery tubes of the lifterjet. The difl'erenoe is that the apparatus illustrated by the diagram is not well adapted to varying pressures of steam, while the apparatus shown in Fig. 1 is self-regulating-and works equally,

well at widely-Varying pressures.

The main merit of my apparatus is that nothing need be done but turn on the steam, when the apparatus takes care of itself.

As the steam-pressure varies, the quantity of water taken into the tube (2 and delivered to tubef also varies, more being taken in under steam of heavy pressure than under steam of alighter pressure. It is for this reason that the holes d at the junction of tubes dand d make a practical improvement in the working of the apparatus, for they adapt it more perfectly to use with steam varying largely in pressure. The apparatus with these regulating-tubes works admirably under all pressures with which I have been enabled to test it from low steam up to steam of over one hundred pounds.

The openings f in the tube f and between f and f are connections with the overflow G, and, as will be clear, these two tubes f and f may be a singletube, asshown in Fig. 2, if the area of the opening f be sufficient to allow the steam from both nozzles to escape readily through the overflow. (See Fig. 2.) Thevalve j serves to allow the apparatus to drain when the steam is shut oft. It is forced upon its seat by the pressure of the water in chamber J when the apparatus is in operation and opened by atmospheric pressure when steam is shut oft. A pipe with stop-cock leading from chamber J, as shown in Giffards patent, may be used in lieu of valvej.

It will be clear that I do not claim any of the parts of my apparatus, but

What I do claim :is

1. In combination, nozzle D, tubes d d, water-chamber a, nozzle F, tubes f f f, with openings f and overflow g, the openings f connecting the combining-tube of nozzle F with the overflow, all substantially as described.

2. In combination, nozzle D, tubes d d,with opening d, water-chamber a, nozzle F, tubes fff, with openings f, and overflow G, the openings 01 connecting the combining-tube d of nozzle-D with the Water-supply, and the openingsf connecting the combining-tubeff of nozzle F with the overflow, all substantially as described.

WM. R. PARK.

Witnesses:

J. E. MAYNADIER, O. B. MAYNADIER. 

